Draw-gear and buffing apparatus.



` 190.719,949. PATE-NTSB 1199.9,1903.

J. H. MGGORMIGK. j `DRAW GEAR ANDBUFFING APPARATUS.

APPLIOATION FILED FEB. 28. 1902. N0 MODEL. z SHEETS-SHEET 1.

WITNESSES: INV NTORl @f4 WM l M '210.719,949. '-PATENTED PEB.3,1`903. J.H. MGGORMIGK.

DRAW vGEAR AND BUFFING APPARATUS. w vA PPLnmfrIoN FILED rma. 2e. 1902.

'No MODEL. i 2 SHEETS-SHEET 2.

a@` Y Fish4- @de 56 JOHN I-I. MCOORMIOK,

OF COLUMBUS, OHIO.

DRAW-GEAR AND BUFFING APPARATUS.n

SPECIFICATION forming part of Letters Patent N o. 719,949, datedFebruary 3, 1903. A.Application filed February 28, 1902. `Serial No.96,060. (No model.)

T0 aZZ when?. zit may concern:

Be it known that I, JOHN H. McCoRMIoK, a citizen of the United States,residing at Columbus, in the county of Franklin Yand State of Ohio, haveinvented a certain new and useful Improvement in Draw-Gear and BuftingApparatus, of whichfthe following is a specification.

My invention relates to that class or typeV of draw-gear and buingapparatus in which frictional resistance is employed in connection witha resisting-spring to reduce shocks and prevent rebound` that resultfrom heavy bodies, such as cars, meeting in violent contact with eachother. A

The object of my invention is to provide a combined draw-gear andbuiiing apparatus of improved construction that Awill have increasedefficiency and will have embodied in it the elements of simplicity,strength, durability, and reduced cost of manufacture, as well as beingeasily adaptable to all existing constructions in cars.

My invention consists in the various constructions and combinations ofparts hereinafter described, and more fully set forth in the claims.

These objects I accomplish in the manner illustrated in the accompanyingdrawings, in

whichl Figure l is a longitudinal vertical section through the center ofthe draw-gear and buffing apparatus, showing the relative normalpositions of the parts, the yoke-strap and the.

end of the draw-bar being shown in full. Fig. 2 is a plan view of theapparatus, showing how it is attached to the car-sills by means of thesill-plates. Fig. 3 isa transverse section of the apparatus, theyoke-strap, and the sillplates on line no m of Fig. l, the spring beingomitted for the sake of clearness. Fig. 4 is an end view of the rearfollower-plate. Fig. 5 is a horizontal section on line z z of Fig. 4;and Fig. 6 is a longitudinal diagonal section of the apparatus on theliney y of Fig. 3, showing the relative normal position of adjacentfrictional plates.

Similar` numerals refer to similar parts throughout the several views.

In the drawings, 1 represents the rear end of the draw-bar. Rigidlybolted to the draw- Abar 1 is the usual yoke-strap 2. Bearing againstthe end of the draw-bar l and resting top and bottom against theyoke-strap V2 is the front follower-plate 3. Bearing against the rearend of .the yoke-strap 2 is theV rear follower-plate`4. Thefollower-plates 3 and 4 are preferably made rectangular and have aflange on each edge, which is beveled at the base on the inside. Thefianges on the follower-plates 3 and 4 form bearings for the ends ofmovable segments 5, 5, 5b, and 5, the ends of which are beveled on theoutside to conform to the bevel on the flanges of the follower-plates 3and 4. The segments 5, 5, 5b, and 5c each have radial longitudinalflanges 5d and 5, that increase their strength and at the same timeprovide additional bearing or frictional surfaces. It will be observedthat the bearing-surfaces of the iianges 5 are cut away or hollowed outwhere they bear against the adjacent anges 5, the recesses thus formedbeing extended partially into the casing formed by the segments. This isfor the purpose of providing better frictional surfaces, as the spacesthat are shown as hollow on the frictional surfaces .of thesegmentflanges 5d and 5e are to be filled with composition or woodiilling. Each of the movable segments 5, 5, 5b, and 5c have twoinwardlyprojecting portions which serve as end bearings for the spring6. The longitudinal location of the projections ou the segments, inconnection with the spring 6, which is located between them, holds thesegments 5, 5, 5b, and 5c in their normal positions. Between the end ofthe spring 6 and the` inward projections on the segments 5, 5, 5b, and5C is a liat plate 7, which also bears against a central projection 4 onthe rear follower-plate 4. By this arrangement the rear followerplate 4has a direct bearing against the spring 6 and is held from contact withthe rear ends of the segments when in normal position. The sill-plates Sand 8, which are securely bolted to the draft-sills of the car, as shownin the drawings, are made with flanges on each edge, which serve asguides and bearings for the follower-plates 3 and 4. (See Fig. 3.)

The operation of the parts thus described is as follows: When used asdraw-gear, the action is a draft or pulling operation on the draw-bar,and the draw-bar l, the yoke-strap 2, which is bolted to it, and therear follower- ICO plate4 are moved forward against the resistance ofthe spring 6, one end of which bears against the rear follower-plate 4by means of the central projection 43L on the follower 4 and through theplate 7. The other end of the spring 6 bears on the inward projectionsof the segments 5, 5a, 5b, and 5, two of which, 5 and 5b, bear againstthe flanges of the front follower-plate 3, which in turn bears against;

the flanges of the sill-plates 8 and Sa. The rst result of the pullingaction on the drawbar is to close up the space between the rear ends ofthe movable segments 5a and 5c and the follower-plate 4. Thisarrangement is desirable because it allows all slight movements of thedraw-bar to be taken up by the resistance of the spring alone, thussaving wear on the frictional parts that are intended to absorb theheavier shocks. The next result of continued forward movement of thedraw-bar is that the beveled rear end of the movable segments 5a and 5on contacting with the beveled part of the ange on the follower 4 willbe pressed forward longitudinally and at the same time be subjected toan inward pressure toward each other. The inward pressure on thesegments 5*PL and 5c is resisted by the segments 5 and 5b, which in turnare held from outward movement at their rear ends by the parallelportions of the flanges on the rear follower-plate 4. The resistance tolongitudinal movement of the segments 5a and 5c comes from the frictionthat has been created between them and the adjacent segments 5 and 5b byresistance of the spring 6, acting through the beveled ends of themovable segments and the beveled portions of the flanges on thefollower-plates. The segments 5 and 5h are held from longitudinalmovement in a forward direction, as they bear directly against frontfollower-plate 3, but are subjected to an inward pressure, as theirbeveled ends bear against the bevels on the flanges of thefollower-plate 3 and are resisted by the segments 5a and 5,which in turnbear against the flanges on the follower-plate 3. Thus it is seen thatthe movable segments 5 and 5C receive an inward pressure at the rearend, which is resisted by the segments 5 and 5b, while segments 5 and 5breceive an inward pressure at their forward ends, which is resisted bysegments 5n and 5C. By reference to Figs. l and 6 it is easily seen thatpressure from either direction in pulling or bufting actions istransmitted only through the bevels on the flanges of thefollower-plates to the bevels on the ends of the movable segments, andthere can be no longitudinal movement of the segments 5, 5, 5b, and 5Cunless accompanied by a clamping pressure on all the segments at bothends, which must result in frictional resistance to any longitudinalmovement. A buiiing or pushing action from the draw-bar will haveexactly the same result as the draft or pulling action just described.The first pressure of the forward follower-plate 3 will clamp all thesegments 5, 5, 5b, and 5C together, and

they will all move backward until the spring 6 is compressedsufficiently to allow the bevel on the end of the segments 5a and 5C tocontact with the bevels on the ange of the rear follower 4. In thebufling action the segments 52L and 5c now remain stationary, bearingagainst the rear follower-plate 4,V and the segments 5 and 5b are pushedbackward longitudinally against the friction resistance created and thedirect resistance of the spring 6, which in this case will bear againstthe inward projections on the segments 5 and 5. In both draft and bufngoperations the return of the parts to normal position is by means oft-he spring 6 after the draft or buing pressures have been reduced orcease to act. The spring in returning the parts must act through thebevels on the ends of the movable segments and the bevels on the flangesof the follower-plates. Any resistance that the draw-bar may offer willbe increased by the frictional resistance that will be created betweenthe movable segments. This feature of the draw-gear and buftingapparatus prevents the violent rebound or return of the parts.

It is obvious that the details can be varied considerable withoutdeparting from the spirit of the invention. For instance, more movablesegments and more springs can be introduced, thus increasing thefrictional surfaces and the capacity.

Having now fully described my invention, what I claim, and desire tosecure by Letters Patent. is-

l. In a draw-gear and bufting apparatus, the combination of segmentallongitudinallymovable parts that bear against each other to createfriction, a compression-spring bearing against adjacent contactingsegments to force them in opposite directions, and means for pressingthe segments against each other, substantially as specified.

2. In a draw-gear and bufing apparatus, the combination of segmentalparts bearing against each other and capable of movement longitudinallyone toward the other, a spring inclosed by the segments, and means forclamping and pressing the segments together at both ends, substantiallyas specified.

3. In a draw-gear and bnfng apparatus, the combination oflongitudinally-movable contacting segments, a spring pressing adjacentsegments in opposite directions, and a wedging device for creatingfriction between the segments, substantially as specified.

4. In a draw-gear and bufting apparatus, the combination oflongitudinally-movable contacting segments, a follower-plate having acentral projection, a spring inclosed by the segments, and bearingagainst the central projection on the follower-plate, and means forcreating friction between the segments, substantially as specified.

5. In a draw-gear and bufiing apparatus, the combination oflongitudinally-movable contacting segments with beveled ends, fol- ICOIIO

pflacas lower-plates at each end having inside beveled flanges orprojections and a spring inclosed by the segments and bearing at eachend against central projections on the segments, substantially as andfor the purpose specified.

6.' In a draw-gear and bufng apparatus, the combination oflongitudinally-movable contacting segments having central projections toserve as spring-bearings, a spring inclosed by the segments, a plate ordisk between the end of the spring en one side and the centralprojections of the segments and the central projection of thefollower-plate on theother side and means for creatingfriction etweenthe segments, substantially as speci- JOHN H. MCCORMICK.

In presence of;

A. L. PHELPS, W. L. MORROW.

